extragalactic nebula

英 美
  • 河外星云
  • extemporal adj.无准备的(即席的;临时的;权宜之计的)
  • extemporary adj.当场的;即兴的
  • extempore adj.即兴的;当场的adv.即席地;无准备地
  • extemporise vt.当场作成
  • extemporize v.即席演说;即兴演奏;当场作成=extemporise(英).
Noun:
  1. (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust;

    "`extragalactic nebula' is a former name for `galaxy'"

【邻近词汇】